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serial: sccnxp: Implement polling mode

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This patch adds support for polling work mode, i.e. system is perform
periodical check chip status when IRQ-line is not connected to CPU.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Shiyan 2012-12-03 22:23:31 +04:00 • committed by Greg Kroah-Hartman
commit ec063899b7
2 changed files with 105 additions and 45 deletions
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2
include/linux/platform_data/sccnxp.h
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@ -84,6 +84,8 @@ struct sccnxp_pdata {
const u8 reg_shift;
/* Modem control lines configuration */
const u32 mctrl_cfg[SCCNXP_MAX_UARTS];
/* Timer value for polling mode (usecs) */
const unsigned int poll_time_us;
/* Called during startup */
void (*init)(void);
/* Called before finish */